Malicious PDF — malware analysis report

Static analysis result for SHA-256 265889f8a114c0bd…

MALICIOUS

PDF

74.5 KB Created: 2021-09-12 03:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c1041aa584e9339917215eb3287fd42e SHA-1: be4d1a9a87a17205e2bd43a56e05b6a68d755822 SHA-256: 265889f8a114c0bdb0f9503f9e416b4fcd0b96d611d74ced57f73113f9100358
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to other PDFs. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document's intent is to trick users into downloading a password-protected archive. The embedded JavaScript likely facilitates the download or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://apsencollege.org/test/fckeditor/file/rogewamejobupezorobafif.pdf In PDF document text
    • https://hyundainhapkhau.vn/upload/files/kawub.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/sizomalikowa.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/tepalavojolefanakogami.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/rurupuwelul.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/zonojufajunijekigixojer.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/n443vttvv3hjgaqu39ch6uq431/zoposanazekedopaketexune.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/38895813041.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/73961134766.pdfIn PDF document text
    • http://fruitvita.com/files/files/49631313845.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/24686323441.pdfIn PDF document text
    • http://goref.ru/files/file/bugumefosavenexejumoxa.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/laruroporolevotilobipo.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/42692093241.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/sirupologomemi.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/98408835157.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/1321892021.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/lofuletiwogevajamu.pdfIn PDF document text
    • https://kawanmto.info/contents/files/juwagojuwanitiki.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/38458140251.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/73476859567.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/geduwedozoxonitujo.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/misasupijajijizitutiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gta+vice+city+ultimate+free+download+for+windows+7+zip+filePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 11296 bytes
SHA-256: d3a43163687eaaf0e7f81eeda20983a629fca33cbdd7121d0a5888ca8773a4eb
font_02_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 16096 bytes
SHA-256: d924d09c8a48369d1821c92551de7f76d19ad7c26ab86b3b570d5687d199345d